JOURNAL ARTICLE

Seasonal variation of water quality and phytoplankton response patterns in Daya Bay, China

Cui-Ci Sun, You-Shao Wang, Mei-Lin Wu, Jun-De Dong, Yu-Tu Wang, Fu-Lin Sun, Yan-Ying Zhang
International Journal of Environmental Research and Public Health 2011, 8 (7): 2951-66
21845168
Data collected from 12 stations in Daya Bay in different seasons in 2002 revealed the relation between water quality and phytoplankton response patterns. The results showed that Daya Bay could be divided into wet and dry seasons by multivariate statistical analysis. Principal component analysis indicated that temperature, chlorophyll a and nutrients were important components during the wet season (summer and autumn). The salinity and dissolved oxygen were the main environmental factors in the dry season (winter and spring). According to non-metric multidimensional scaling, there was a shift from the large diatoms in the dry season to the smaller line-chain taxa in the wet season with the condition of a high dissolved inorganic nitrogen and nitrogen to phosphorous concentration ratio. Nutrient changes can thus alter the phytoplankton community composition and biomass, especially near the aquaculture farm areas. There was no evidence of an effect of thermal water from the nearby nuclear power plants on the observed changes in phytoplankton community and biomass in 2002.

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